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Vitamin D is essential for bone metabolism, it maintains proper concentrations of calcium and phosphate in the blood.
Overdose of vitamin D can be harmful because it can cause too much absorption of calcium. Excess calcium
in the blood can be deposited in the heart and kidneys which is dangerous to health.
Vitamin D helps the body to use calcium to support bone health, 600 IU is recommended for an adults per day. Apart from supplement it can be found in beef, liver, canned salmon, sardines, cheese, egg yolks, fortified milk orange juice and sunlight
Vitamin D is made in the skin when exposed to sunlight. The overdose can cause excess calcium in the blood, which can cause fractures, lethargy, high blood pressure, heart problems, hardening of the arteries, kidney stones and some cancers.